Knowing that a photon can not be at rest, I was wondering what would happen supposing if we travel at the same constant speed as light in parallel or in front of a specific ray of light. Would that ray of light seems to be still for us? Would the momentum mass of the photons of that specific light ray all turn out to be 0 since now it have come to rest? Therefor, does that ray of light and it's photon relatively in a sense cease to exist from our point of view due to the synchronized co-moving? From light, it will simply turn out into emptiness?